The writings in their original three books had numerous grammatical errors, and his writings in them often took a dark, and angry, and a self-described paranoid tone.[208][209][210] While the content of most of his writings was kept in Wall and Piece, the stories were edited and generally took a less provocative tone, and the grammatical errors were resolved (presumably to make it suitable for mass market distribution).[207]

Contrairement à un tirage photo classique qui, exposé en pleine lumière, jaunira après quelques années, un tirage d'art a une longévité exceptionnelle d'environ 100 ans. Ces tests de longévité sont opérés par des instituts spécialisés indépendants comme le Wilhelm Research Institute sur la combinaison des encres pigmentaires et des papiers d'art sélectionnés par Artdeqo.
There exists a debate about the influence behind his work. Some critics claim Banksy was influenced by musician and graffiti artist 3D. Another source credits the artist's work to resemble that of French graffiti artist called Blek le Rat. It is said that Banksy was inspired by their use of stencils, later taking this visual style and transforming it through modern political and social pieces.[190]

In the 1930s there was a worldwide trend towards making art more public in reaction to the introspective development of modern art. In Latin America, USA and Britain, mural painting became popular thanks to governmental sponsorship in the form of organisations like the Artists International Association. In 1933 Mario Sironi published his Manifesto of Mural Painting and commissioned murals by Giorgio De Chirico and Carlo Carrà. In Germany, Italy and the USSR murals reflected the totalitarian propaganda of the State.

“Banksy is unique to the art world. No other artist captures the hearts and minds of the public like he does,” Syer said. “What this person today seems to have done is needlessly ruin a print worth around £40,000 and reduce its value to almost nothing…[there] are limited numbers of Girl With Balloon prints in the world, today, we lost one and it's a crying shame.”

In May, to coincide with the premiere of Exit Through the Gift Shop in Royal Oak, Banksy visited the Detroit area and left his mark in several places in Detroit and Warren.[93] Shortly after, his work depicting a little boy holding a can of red paint next to the words "I remember when all this was trees" was excavated by the 555 Nonprofit Gallery and Studios. They claim that they do not intend to sell the work but plan to preserve it and display it at their Detroit gallery.[94] There was also an attempted removal of one of the Warren works known as Diamond Girl.[95]

Many home owners choose to display the traditional art and culture of their society or events from their history in their homes. Ethnic murals have become an important form of interior decoration. Warli painting murals are becoming a preferred mode of wall decor in India. Warli painting is an ancient Indian art form in which the tribal people used to depict different phases of their life on the walls of their mud houses.